20540800

素因数分解:

$2^7\times 5^2\times 7^2\times {\mathrm{131}}^1$

素因数の和:169

約数の個数: 144

約数和(自身を含む): 59477220

約数和(自身を除く): 38936420

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 64, 70, 80, 98, 100, 112, 128, 131, 140, 160, 175, 196, 200, 224, 245, 262, 280, 320, 350, 392, 400, 448, 490, 524, 560, 640, 655, 700, 784, 800, 896, 917, 980, 1048, 1120, 1225, 1310, 1400, 1568, 1600, 1834, 1960, 2096, 2240, 2450, 2620, 2800, 3136, 3200, 3275, 3668, 3920, 4192, 4480, 4585, 4900, 5240, 5600, 6272, 6419, 6550, 7336, 7840, 8384, 9170, 9800, 10480, 11200, 12838, 13100, 14672, 15680, 16768, 18340, 19600, 20960, 22400, 22925, 25676, 26200, 29344, 31360, 32095, 36680, 39200, 41920, 45850, 51352, 52400, 58688, 64190, 73360, 78400, 83840, 91700, 102704, 104800, 117376, 128380, 146720, 156800, 160475, 183400, 205408, 209600, 256760, 293440, 320950, 366800, 410816, 419200, 513520, 586880, 641900, 733600, 821632, 1027040, 1283800, 1467200, 2054080, 2567600, 2934400, 4108160, 5135200, 10270400, 20540800]

約数ペア:

[(1, 20540800), (2, 10270400), (4, 5135200), (5, 4108160), (7, 2934400), (8, 2567600), (10, 2054080), (14, 1467200), (16, 1283800), (20, 1027040), (25, 821632), (28, 733600), (32, 641900), (35, 586880), (40, 513520), (49, 419200), (50, 410816), (56, 366800), (64, 320950), (70, 293440), (80, 256760), (98, 209600), (100, 205408), (112, 183400), (128, 160475), (131, 156800), (140, 146720), (160, 128380), (175, 117376), (196, 104800), (200, 102704), (224, 91700), (245, 83840), (262, 78400), (280, 73360), (320, 64190), (350, 58688), (392, 52400), (400, 51352), (448, 45850), (490, 41920), (524, 39200), (560, 36680), (640, 32095), (655, 31360), (700, 29344), (784, 26200), (800, 25676), (896, 22925), (917, 22400), (980, 20960), (1048, 19600), (1120, 18340), (1225, 16768), (1310, 15680), (1400, 14672), (1568, 13100), (1600, 12838), (1834, 11200), (1960, 10480), (2096, 9800), (2240, 9170), (2450, 8384), (2620, 7840), (2800, 7336), (3136, 6550), (3200, 6419), (3275, 6272), (3668, 5600), (3920, 5240), (4192, 4900), (4480, 4585)]